(function( $ ){
    $.fn.qrcode = function(options) {
        // if options is string,
        if( typeof options === 'string' ){
            options	= { text: options };
        }

        // set default values
        // typeNumber < 1 for automatic calculation
        options	= $.extend( {}, {
            render		: "canvas",
            width		: 256,
            height		: 256,
            typeNumber	: -1,
            correctLevel	: QRErrorCorrectLevel.H,
            background      : "#ffffff",
            foreground      : "#000000"
        }, options);

        var createCanvas	= function(){
            // create the qrcode itself
            var qrcode	= new QRCode(options.typeNumber, options.correctLevel);
            qrcode.addData(options.text);
            qrcode.make();

            // create canvas element
            var canvas	= document.createElement('canvas');
            canvas.width	= options.width;
            canvas.height	= options.height;
            var ctx		= canvas.getContext('2d');

            // compute tileW/tileH based on options.width/options.height
            var tileW	= options.width  / qrcode.getModuleCount();
            var tileH	= options.height / qrcode.getModuleCount();

            // draw in the canvas
            for( var row = 0; row < qrcode.getModuleCount(); row++ ){
                for( var col = 0; col < qrcode.getModuleCount(); col++ ){
                    ctx.fillStyle = qrcode.isDark(row, col) ? options.foreground : options.background;
                    var w = (Math.ceil((col+1)*tileW) - Math.floor(col*tileW));
                    var h = (Math.ceil((row+1)*tileW) - Math.floor(row*tileW));
                    ctx.fillRect(Math.round(col*tileW),Math.round(row*tileH), w, h);
                }
            }
            // return just built canvas
            return canvas;
        }

        // from Jon-Carlos Rivera (https://github.com/imbcmdth)
        var createTable	= function(){
            // create the qrcode itself
            var qrcode	= new QRCode(options.typeNumber, options.correctLevel);
            qrcode.addData(options.text);
            qrcode.make();

            // create table element
            var $table	= $('<table></table>')
                .css("width", options.width+"px")
                .css("height", options.height+"px")
                .css("border", "0px")
                .css("border-collapse", "collapse")
                .css('background-color', options.background);

            // compute tileS percentage
            var tileW	= options.width / qrcode.getModuleCount();
            var tileH	= options.height / qrcode.getModuleCount();

            // draw in the table
            for(var row = 0; row < qrcode.getModuleCount(); row++ ){
                var $row = $('<tr></tr>').css('height', tileH+"px").appendTo($table);

                for(var col = 0; col < qrcode.getModuleCount(); col++ ){
                    $('<td></td>')
                        .css('width', tileW+"px")
                        .css('background-color', qrcode.isDark(row, col) ? options.foreground : options.background)
                        .appendTo($row);
                }
            }
            // return just built canvas
            return $table;
        }


        return this.each(function(){
            var element	= options.render == "canvas" ? createCanvas() : createTable();
            jQuery(element).appendTo(this);
        });
    };
})( jQuery );